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Buying guide: how to choose a smartphone

Two smartphones at the same price can last very different amounts of time or shoot photos with unrelated sensors. Battery life, screen, camera, storage and power together set the real differences between models, well before the design of the case.

What to check

Battery life This criterion is based on battery capacity, measured in mAh: the higher it is, the longer the bar and the longer the device lasts without recharging. Across recent listings on the market, values range from about 3,700 mAh at the lower end to 5,820 mAh at the higher end, with a median around 4,500 mAh. Heavy use, with the screen on often and many apps running, makes this criterion especially decisive day to day. Market median: 4,500 mAh
Screen size This criterion measures the screen diagonal in inches: the larger it is, the higher the score, since a bigger display is more comfortable for reading, watching video or browsing. Reference values range from 6.1 inches to 7.95 inches, with a median of 6.7 inches. A larger screen makes reading easier but also makes the device bulkier in a pocket, a trade off worth weighing against intended use. Market median: 6.7 "
Camera resolution This criterion is based on the rear camera resolution, in megapixels: the bar lengthens as it increases. Market values range from 12 MP at the low end to 200 MP at the high end, with a median of 50 MP. A higher resolution allows more cropping flexibility and more detailed prints, a point worth checking for anyone who photographs often with their phone. Market median: 50 MP
Storage This criterion measures internal storage capacity in GB: the larger it is, the better suited the device is to holding photos, videos and apps without frequent clean ups. Reference values range from 128 GB to 1,000 GB, with a median of 256 GB. This criterion matters most for anyone who keeps a lot of content stored locally or installs many large apps. Market median: 384 GB
Power This criterion measures RAM capacity in GB, reflecting the electrical power of the machine: the longer the bar, the faster it ramps up in pressure and temperature. Reference values range from 4 GB to 16 GB, with a median of 12 GB. Generous RAM helps run several apps at once without slowdown, an advantage for sustained multitasking. Market median: 8 GB
Everyday care A smartphone lasts longer with a few simple habits: avoiding drops and moisture, keeping the system updated, and not letting the battery repeatedly drain to empty. Regularly clearing unused files and apps from storage also helps keep the device running smoothly over time, rather than waiting for it to show signs of slowing down.

Benchmarks based on 30 recent market listings, collected on 1 October 2026.

What you get for each budget

Under €250

At this price level, devices generally sit closer to the lower reference values for battery life, camera and power, with storage often limited.

€250 to €600

This range brings together most profiles close to the median across all criteria, a balanced compromise between battery life, screen, camera, storage and power.

Over €600

Beyond this threshold, models move closer to the best reference values, particularly for camera, storage and power, suited to intensive or demanding use.

Frequent mistakes

Choosing based on screen size alone without checking battery life, which shapes daily use far more.
Trusting the advertised camera resolution without checking whether other criteria, like power, keep up to process the images.
Underestimating storage needs and then constantly having to manage available space.
Confusing storage with power: one holds data, the other runs the apps.
Overlooking real battery life needs in favour of a lower price, only to recharge the device several times a day.

Models in this category

Best rated first, among those our merchants offer.

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